From patchwork Mon Apr 17 09:10:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dhruva Gole X-Patchwork-Id: 674983 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66587C77B72 for ; Mon, 17 Apr 2023 09:10:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229605AbjDQJK4 (ORCPT ); Mon, 17 Apr 2023 05:10:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230181AbjDQJK4 (ORCPT ); Mon, 17 Apr 2023 05:10:56 -0400 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E586F184 for ; Mon, 17 Apr 2023 02:10:54 -0700 (PDT) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 33H9Ahdx054374; Mon, 17 Apr 2023 04:10:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1681722643; bh=UXcdFetYc0x4zAHUqoGiOI+equY21mfPsG8/IYPhF4g=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=on/KdjPWVSrKcz5q562rAXd+QSsL4fcheY3gRNF3ZG+jnrb03OE10MWBE8zk8PbG0 07jhpfTN58cROBvTHdpSt9kszW5uNRJ0KsB3Fmm4nMSrN4Ti0d7rgqnVrRpQV75Igt PlbP18YV2EPPIf0OzqoorddfBgQq2KBjJxY7EjqQ= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 33H9AhPH107594 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 17 Apr 2023 04:10:43 -0500 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Mon, 17 Apr 2023 04:10:43 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16 via Frontend Transport; Mon, 17 Apr 2023 04:10:43 -0500 Received: from localhost (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 33H9Aglp102040; Mon, 17 Apr 2023 04:10:42 -0500 From: Dhruva Gole To: Mark Brown CC: Dhruva Gole , Vaishnav Achath , Vignesh , Apurva Nandan , , Subject: [PATCH 2/2] spi: cadence-quadspi: fix suspend-resume implementations Date: Mon, 17 Apr 2023 14:40:27 +0530 Message-ID: <20230417091027.966146-3-d-gole@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230417091027.966146-1-d-gole@ti.com> References: <20230417091027.966146-1-d-gole@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The cadence QSPI driver misbehaves after performing a full system suspend resume: ... spi-nor spi0.0: resume() failed ... This results in a flash connected via OSPI interface after system suspend- resume to be unusable. fix these suspend and resume functions. Fixes: 140623410536 ("mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller") Signed-off-by: Dhruva Gole --- drivers/spi/spi-cadence-quadspi.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index d47e954fe809..91908e8cf92e 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1816,17 +1816,30 @@ static void cqspi_remove(struct platform_device *pdev) static int cqspi_suspend(struct device *dev) { struct cqspi_st *cqspi = dev_get_drvdata(dev); + struct spi_master *master = dev_get_drvdata(dev); + int ret; + ret = spi_master_suspend(master); cqspi_controller_enable(cqspi, 0); - return 0; + + clk_disable_unprepare(cqspi->clk); + + return ret; } static int cqspi_resume(struct device *dev) { struct cqspi_st *cqspi = dev_get_drvdata(dev); + struct spi_master *master = dev_get_drvdata(dev); - cqspi_controller_enable(cqspi, 1); - return 0; + clk_prepare_enable(cqspi->clk); + cqspi_wait_idle(cqspi); + cqspi_controller_init(cqspi); + + cqspi->current_cs = -1; + cqspi->sclk = 0; + + return spi_master_resume(master); } static SIMPLE_DEV_PM_OPS(cqspi__dev_pm_ops, cqspi_suspend, cqspi_resume);